System analyst of smart city system. Investigate requirements, and build model with devices and software interfaces based on system. Build smart city backend by Java, and Kotlin. Using hibernate as ORM, Redis as on-memory cache, and implements MQTT for controlling remote devices. It had integrated Jetty Server, a Servlet engine, to provide HTTP restful API, and it is complied with OpenAPI 3 spec, the system also implemented the AAA with 2FA feature for accounting, device grouping, access control, and organization-based isolation, these is need for cloud-based smart city service. Also designed some IoT device hardware based on requirement, design hardware by using AVR-based microcontrollers for peripherals, also build with Raspberry Pi for more complex scenario, and build schematics and Gerber by KiCad. Since there are microcontrollers in hardware, I also developing firmware for these devices. Mostly using Arduino for AVR, also Python 3 and shell script are engaged with Raspberry Pi scenarios. And developing zigbee-based smart city devices as well, porting software to desired platform if needs. Projects I had attended is below, Project Name: Dolight Smart City Cloud Responsibility: Design, develop and maintain whole cloud system. Period: 2018/11-2020/3 Title: System Analyzer/Designer Skills: Kotlin, Java, JPA, Servlet, HTTP RESTful, OpenAPI 3, Shell script, Linux IDE: IntelliJ IDEA, Eclipse System: Debian-based Linux, OpenJDK JRE11 Project Name: eRC (Remote controller of electricity circuit) Responsibility: Design from requirement, develop and maintain eRC controller firmware. Period: 2019/1-2020/6 Title: Analyzer/Designer/Developer Skills: C, Python, MQTT, Qt 5 IDE: Arduino, PyCharm, Qt Designer System: Raspbian Buster, Python 3.7 Project Name: ECAM (Edge Computing Accessing Module) Responsibility: Design from requirement, develop and maintain ECAM controller hardware and firmware. Period: 2019/12-2020/2 Title: Analyzer/Designer/Developer Skills: Schematics, Hardware design, C, Python, MQTT IDE: KiCad, Arduino, PyCharm System: Raspbian Buster, Python 3.7

Developing Android apps for remote health care, skin care, and medicine cabinet kiosk. Projects I had involved are below. App name: 中國醫藥大學北港附設醫院遠距照護 Responsibility: develop and maintainance app, includes app UI flow, API interconnect, bluetooth LE interconnection, non FCM-based push notification, and more. Period: 2017/8-2018-9 Title: Android Developer Skills: Kotlin, Java, Bluetooth LE, MQTT IDE: Android Studio System: Android 5+ Play Store Link: https://play.google.com/store/apps/details?id=com.syntrontech.syncare.cmubh App name: 台東縣衛生局遠距照護 Responsibility: update and maintainance existed app, includes app UI flow, API interconnect, standard bluetooth interconnection, and more. Period: 2017/4-2018-9 Title: Android Developer Skills: Java, Kotlin, Bluetooth LE IDE: Android Studio System: Android 5+ Play Store Link: https://play.google.com/store/apps/details?id=com.syntrontech.syncare.ttshb App name: 台東縣原民處遠距照護 Responsibility: develop app from sketch, includes app UI flow, API interconnect, standard bluetooth interconnection, and more. Period: 2018/4 - 2018/9 Title: Android Developer Skills: Kotlin, Java, Bluetooth LE IDE: Android Studio System: Android 5+ Play Store Link: https://play.google.com/store/apps/details?id=com.syntrontech.syncare.taitabor App name: 萃雅好气色 Responsibility: develop app from sketch, includes app UI flow, customized UI widget, API interconnect, interconnecting with Wi-Fi skin analyzer, preprocessing of images, and more. Period: 2017/9 - 2018/3 Title: Android Developer Skills: Java, Kotlin, JNI, OpenCV IDE: Android Studio System: Android 5+ Store: N/A App name: 開刀房藥局藥櫃藥品管理 Responsibility: develop app from sketch, includes app UI flow, API interconnect, interconnecting with MQTT-based smart doorlock, access RFID tags, and more. Period: 2018/7 - 2018/9 Title: Android Developer Skills: Kotlin, MQTT, RFID IDE: Android Studio System: Android 5+ Store: N/A

engaged in intelligent Lumination System, includes devices' firmware and backend system

Developing wireless sensor network firmware for smart streetlight and environment sensor box, which is based on 802.15.4 single chip solution, and developing gateway software for wireless sensor network.